What structure should I chose for my website?

I have website with local events and news in our city. There are different categories - one for each of event organizers.

Right now I need to add support for other city - so that user can select one of cities and see events and news from it. It also will be great if I can limit access for author in different cities.

What website structure should I use for that case?

Topic switch multisite Wordpress

Category Web

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